Context and content of this CAMS service

The CAMS project (Copernicus Atmosphere Monitoring Service)
provides the operational atmospheric environmental service of
COPERNICUS.
It is operating and improving the data analysis and modelling systems for a number of atmospheric trace gases,
among which O3, NO2, CO, SO2 and formaldehyde.
It is implemented by ECMWF and funded by the European Union.

The CAMS stratospheric ozone service consists of two main parts:

The operational stream includes vertically resolved gridded fields and total ozone columns from analyses by the 4D-Var model C-IFS.

The historic data records comprise both total ozone columns from long-term reanalyses starting in 1978 based on multiple instruments via the TM3DAM approach and 3D gridded fields and total ozone
columns from the three above-mentioned 4D-Var models.

Validation of CAMS stratospheric ozone (and related species) is performed with respect to independent data: